A downhole static power generator according to one or more aspects of the present disclosure comprises a static charge accumulator comprising a dielectric material having a surface to contact a flowing dielectric fluid. The static charge accumulator may be configured to accumulate electrical-potential in response to the dielectric fluid flowing across the surface. In addition, an electrical-potential storage device may be provided to receive the electrical-potential from the static charge accumulator. A charge harvesting device may also be provided to shunt electrical-potential from the static charge accumulator to the electrical-potential storage device.